How Can It Be Sad to Be Young?

Love is hard to express in the heart, and we regret it only after the relationship is over. We are simply enjoying free love, and small inadvertent moments make each other's hearts flutter. We have long been accustomed to being together silently. How could we expect that we would be separated? The three years are full of infinite youth. We have transformed in the youthful time. When we meet again, will it still be the same scenery as before?